dion 2004/08/19 22:09:27
Modified: jexl/xdocs/reference syntax.xml
Log:
start on syntax
Revision Changes Path
1.4 +37 -2 jakarta-commons/jexl/xdocs/reference/syntax.xml
Index: syntax.xml
===================================================================
RCS file: /home/cvs/jakarta-commons/jexl/xdocs/reference/syntax.xml,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -r1.3 -r1.4
--- syntax.xml 20 Aug 2004 04:40:50 -0000 1.3
+++ syntax.xml 20 Aug 2004 05:09:27 -0000 1.4
@@ -21,6 +21,15 @@
</properties>
<body>
+ <section name="Overview">
+ <p>
+ This reference is split up into the following sections:
+ <ol>
+ <li><a href="#Syntax">Syntax</a></li>
+ <li><a href="#Functions">Functions</a></li>
+ </ol>
+ </p>
+ </section>
<section name="Syntax">
<table>
<tr><th>Item</th><th>Description</th></tr>
@@ -44,10 +53,18 @@
</td>
</tr>
<tr>
- <td>Identifier / variable</td>
+ <td>String literals</td>
+ <td>
+ Can start and end with either <code>'</code> or <code>"</code>, e.g.
+ <source>"Hello world"</source> and
+ <source>'Hello world'</source> are equivalent.
+ </td>
+ </tr>
+ <tr>
+ <td>Identifiers / variables</td>
<td>
Must start with <code>a-z</code>, <code>A-Z</code>, <code>_</code> or
<code>$</code>.
- Can then be followed by <code>0-9</code>,<code>a-z</code>,
<code>A-Z</code>, <code>_</code> or <code>$</code>.
+ Can then be followed by <code>0-9</code>, <code>a-z</code>,
<code>A-Z</code>, <code>_</code> or <code>$</code>.
e.g.
<ul>
<li>Valid: <code>var1</code>,<code>_a99</code>,<code>$1</code></li>
@@ -58,6 +75,24 @@
<tr>
<td>Assignment</td>
<td><source>var1 = var2</source></td>
+ </tr>
+ </table>
+ </section>
+ <section name="Functions">
+ <table>
+ <tr><th>Function</th><th>Description</th></tr>
+ <tr>
+ <td>empty</td>
+ <td>
+ Returns true if the expression following is either:
+ <ol>
+ <li><code>null</code></li>
+ <li>An empty string</li>
+ <li>An array of length zero</li>
+ <li>A collection of size zero</li>
+ <li>An empty map</li>
+ </ol>
+ </td>
</tr>
</table>
</section>
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